package homework;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;

/**
 * 聊天室服务器 版本4
 */
public class Server4 {
    private ServerSocket serverSocket;
    ArrayList<PrintWriter> allOut = new ArrayList<>();


    Server4() {
        try {
            System.out.println("正在建立服务器...");
            serverSocket = new ServerSocket(8000);
            System.out.println("服务器已建立");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void start() {
        try {
            while (true) {
                System.out.println("等待客户端连接");
                Socket socket = serverSocket.accept();
                System.out.println("客户端已连接");
                ClientHandler handler = new ClientHandler(socket);
                Thread t = new Thread(handler);
                t.start();

            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static void main(String[] args) {
        Server4 server = new Server4();
        server.start();
    }

    private class ClientHandler implements Runnable {
        private Socket socket;
        private String host;

        public ClientHandler(Socket socket) {
            this.socket = socket;
            host = socket.getInetAddress().getHostAddress();
        }

        public void run() {
            try {
                InputStream in = socket.getInputStream();
                InputStreamReader isr = new InputStreamReader(in, StandardCharsets.UTF_8);
                BufferedReader br = new BufferedReader(isr);

                OutputStream out = socket.getOutputStream();
                OutputStreamWriter osw = new OutputStreamWriter(out, StandardCharsets.UTF_8);
                BufferedWriter bw = new BufferedWriter(osw);
                PrintWriter pw = new PrintWriter(bw, true);
                allOut.add(pw);

                String message;
                while ((message = br.readLine()) != null) {
                    System.out.println(host + "说：" + message);

                   for(PrintWriter o :allOut){
                       o.println(host + "说：" + message);
                   }
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }
}